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Description
Catalogue Number	100546
Synonyms	Metaphosphoric acid, m-Phosphoric acid

Product Information
HS Code	2809 20 20
Quality Level	MQ300

Physicochemical Information
Boiling point	600 °C (1013 hPa)
Density	2.0 g/cm3 (20 °C)
Melting Point	200 – 250 °C
pH value	2 (33 g/l, H₂O, 20 °C)
Vapor pressure	<0.001 hPa (20 °C)
Bulk density	1000 kg/m3

Safety Information according to GHS
Hazard Pictogram(s)
Hazard Statement(s)	H314: Causes severe skin burns and eye damage.
Precautionary Statement(s)	P260: Do not breathe dust or mist. P280: Wear protective gloves/ protective clothing/ eye protection/ face protection/ hearing protection. P301 + P330 + P331: IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. P303 + P361 + P353: IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water. P304 + P340 + P310: IF INHALED: Remove person to fresh air and keep comfortable for breathing. Immediately call a POISON CENTER/doctor. P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Signal Word	Danger
Storage class	8B Non-combustible, corrosive hazardous materials
WGK	WGK 3 highly hazardous to water
Disposal	12 Inorganic acids and anhydrides thereof should first be diluted or hydrolyzed by stirring carefully into ice water and then neutralized (protective gloves, fume cupboard!) with sodium hydroxide solution (Cat. No. 105587). Before filling into container D, check the pH with pH universal indicator strips (Cat. No. 109535). Fuming sulfuric acid should be carefully stirred dropwise into 40 % sulfuric acid (Cat. No. 109286). Ensure that plenty of ice is available for cooling! When sufficiently cool, treat the highly concentrated sulfuric acid as described above. Analogous to this procedure, other anhydrides can be converted into their corresponding acids. Acid gases (e.g. hydrogen halide, chlorine, phosgene, sulfur dioxide) can be introduced into dilute sodium hydroxide solution and after neutralization disposed of in container D.

Safety Information
Categories of danger	corrosive

Storage and Shipping Information
Storage	Store at +2°C to +30°C.

Transport Information
Declaration (railroad and road) ADR, RID	UN 3453 , 8, III
Declaration (transport by air) IATA-DGR	UN 3453 , 8, III
Declaration (transport by sea) IMDG-Code	UN 3453 , 8, III, Segregation Group: 1 (Acids)

Specifications
Assay (acidimetric, HPO₃)	40 – 50 %
Assay (acidimetric, NaPO₃)	50 – 60 %
Identity	passes test
Chloride (Cl)	≤ 10 ppm
Nitrate (NO₃)	≤ 10 ppm
Reducing matter (as H₃PO₃)	≤ 100 ppm
As (Arsenic)	≤ 1 ppm
Cd (Cadmium)	≤ 10 ppm
Co (Cobalt)	≤ 5 ppm
Cu (Copper)	≤ 10 ppm
Fe (Iron)	≤ 50 ppm
Mn (Manganese)	≤ 5 ppm
Ni (Nickel)	≤ 10 ppm
Pb (Lead)	≤ 10 ppm
Zn (Zinc)	≤ 10 ppm

Merck 100546 0100 Phosphoric Acid 100 GR.

Merck 100546 0100 Phosphoric Acid 100 GR.

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